Gravity filtration plant.



PATENTED NOV. 26, 1907.

J. G. MAOGRBGOR- GRAVITY FILTRATION PLANT.

APPLIOATIOH FILED MAY 13. 1907.

2 SHEETS-SHEET l.

manna-immunmum mums-m m PA PENTED NOV. 26, 1907.

J. G. MAGGRBGOR.

GRAVITY FILTRATION PLANT.

APPLICATION FILED MAY 13. 1907.

2 SHEETS-SHEET 2.

JOHN GRANT MACGREGOR, OF GODERIOH, ONTARIO, CANADA.

GRAVITY FILTRATION FLANT.

T all' 'whom it may concern:

the invention is to provide a filtration plant of this class adaptable both for small and of the efiluent chamber. one of the guadrantal gratings.

large water supplies, in which the water passes through a maximum area of filtering.

material and in which expensive piping systerns are dispensed with and it consists essentially of a, central chamber forming a reservoir, a series of surrounding filter beds arranged in tiers ascending from the center putwardly, means for automatically control lin the sup ly of water to the outer filter bed operaterf by the rise of the water in the central reservoir, means for sprayin the water evenly over the outer filter bed and means for drawing the supply of filtered water from the surface of the water in the reservoir, the parts all being arranged and constructed as described in the following specification.

Figure I is a vertical sectional view of my filtration plant. Fig. 2 is a plan view on the hne ab Fig. 1. Fig. 3 is an enlarged plan detail of a portion of the inner filter bed, effluent chamber and central reservoir. Fl 4 is a vertical sectional view through the efliuent chamber. Fig. 5 is a front face view Fig. 6 is a view of In the rawings like letters of reference indicate corresponding parts in each fi ure. A is the central chamber of the filter orm ing a reservoir for the filtered water and preferably circular in form.

Surrounding the central reservoir A are a series of annulanwalls A, A and A arranged in tiers ascending outwardly from the center of the filter and connected together by radiallyextending walls 2. i

Between the walls A and A is formed a filter bed A", of coarse material such as broken stone. Between the Walls A and A is formed a filter bed A of finer material such as finely crushed limestone and send. Between the Wall A and the Wall of the central reservoir is formed a filter bed A" of very fine material such as fine quartz sand. The

Specification of Letters Patent.

Application filed May 13. 1907. Serial to. 373.413.

"ted Nov. 1-3 196?.

filter beds A A and A rest in pon inclined concrete beds A. whereby the How oi the filtering water as it percolatet through the beds iis directed toward the center Oi the filter. The concrete bed A" rests upon an underlying bed oi puridled clay whereby the bottom of the inter beds 7 inside impervious to water.

.B is the main feed pipe which leads into the chamber A formed at the outer side of the wall AP.

B is a gatevalvo operated by the hand wheel B and designed. to close the feed of the water entirely from the filter beds when dc-' sired.

B is an annular pipe with which the feed pipe 13 communicates. The pipe B extendsaround and is suitablysupponted over the inner side of the filter bed A. Y

B are a series of outlet pipes extending radiallyoutwardlyiroin the annular pipe B and being provided with valves l3" and are shaped perlorated nozzles B.

The feed of the WallJCl' into the pipe B is autoi'netically controlled by the rise and fall of the water in the central reservoir by mochenism which I will hereinafter describe.

The annular wall A provided with a series of openin s A leading from between the walls A and 3 on a level with the bottom of the filter bed A through the 't'lll A? to a point above the filter bed A. L niilerly A are openings leading from between the walls A and A" from a point on a level with the bottom of the filter bed A through the well A to a point above the wd A.

A are openings preie ing into the central chamber A. :oi the walls A and the walls of the chamber A from a point on a level with the filter bed A.

The openings A are provided. with iiat gratings A to support the material Forming the filter bod A A are gratings (see: 's. '5 and o) of a quadrantal shape in cr oss section, suitably embedded in the concrete an d designed to extend over the openings A and A and support the filtering-material forming the filter beds A and A. A are screens also of a quadrantal sectional formation and contained in grooves formed in the frames of the gratcylindrical screen formed preferably of copper wire cloth of a very fine mesh.

Cis a trough extending arotuid the inside of the wall of the chamber A beneath the openings A and formed in semicircular sec tions C and C from one end of which depend the outlet pipes C and C. 4

Upon opening the pipe B water is fed from the pipe B in the annular pipe B The water passes from y the annular pipe B through the outlet pipe B and the spraying nozzle B by which the water is sprayed evenly over the outer bed A the sprays being individually controlled by the valves B. The water percolates down through the bed A passes through the openings A then percolates through the liner bed A then passes through the screen A and opening A then through the very line bed A" and finally passes through-the duplex screens A into the receiving trough C from. whence itpasses through the pipes C and G into the center tion of the pipe B, and D is a longitudinally movable valve rod therefor.

D are links connecting the valve rod 1) with the crank wheel D.

As the water rises in the chamber A it lifts the float D thereby ,turning the crank wheel D through the link D and rod D and thereby. imparting longitudinal movement to the rod D through the link D thereby closing the valve D. Contrariwise as the water recedes in the chamber the float falls and the valve is again open to feed the water into the filter. y

' I will now describe the means oy which the water is drawn from the chamber A.

E is the efiluent chamber from which the water is drawn off by means of the outlet pipe E which is controlled by the valve E.

E are a series of openings formed in the front face of'the effluent chamber. I

E are series of gates slidably held and arranged in'pairs in front of the openings E and spring held together by the compression springs E suitably held between the outside of each gate and the ends of the openings E (see Fig. 5). Each gate is provided with a,

pin E on which is a roller 15?.

E are vertical E are a pair of floats located in front of the effluent chamber to each side of the center thereof. On the side of the floats are jouruideways suitably supported within the c lamber A.

naled rollers in which move vertically within the guide-ways E9. The floats are held together centrally by the connecting bars E y E is a substantially diamond shaped cam frame secured to the bars E and designed to rise and fall with the float and engage with the rollers E The upper point of the frame enters between and forces each pair of rollers E apart asythe frame rises with the rise of the water in the chamber. A-thereby separating the gates against the pressure of the springs E so as to allow the water to flow through one of the openings E. It will be seen that as the float and frame rise with the water the gate that is upon the same level as the water is opened and those below the water level close as the water rises carrying the float with it. The-same operation occurs through the fall of the water in the chamber A.

For the purpose of flushin out-the central chamber A I provide inlets which are controlled by the valves C".

C is an overflow pipe for the chamber A, and C is anoutlet ipe controlled by the valve C through w ich the waterpasses when flushing the chamber.

What I claim as my invention is;

o from the ends of the trough entering the effluent chamber 1. A filtration plant comprising a central chamber forming a reservoir, a filter bed arranged in a series one without the other,

each bed completely surrounding the central chamber, a water feed pipe, an annular pipe extending over the outer filter bed and with which the feed ipe communicates, radial pipes extending lr provided with controlling valves and areshaped perforated nozzles secured to the end of the radial specified.

(2. In a filtration plant, the combination om the annular pipe and,

pipes as and for the purpose with the annular filter beds, of an annular pipe provided with a suitable water inlet,

radial pipes extending from the annular pipe and terminating in arc-shaped perforated nozzles as and for the'purpose specified.

3. A filtration plant comprising a central chamber forming a reservoir, filter beds arranged in a series one without the other, each bed completely surrounding the central chamber, a water feed pipe an annular pipe lie extending over the outer filter bed and with which the feed pipe communicates, and having a series of outlet pi es provided with spray nozzles and control ing valves, as and for the purpose s ecified.

4. A filter pl ant comprising a central chamber forming fisreservoir, a series of annular walls arranged in outwardly ascending tiers and surrounding the central chamber and having openings extending through the walls at the base, gratings quadrantal in cross section and comprising an outer barred grate .and an inner perforated screen, filter chamber and means operated by the rising beds located between thewalls and extendfloat for spreading the gate members apart,

lng over the gratings and means for feeding as and for the purpose specified. 40 the water over the surface of the outer be 8. In a filtration plant, the combinat on as and for the purpose specified. with the central reservoir, the surroundlng 5. In a filtratlon plant the combination filter beds and the feed pipe, of an effluent with the central reservoir, the surrounding chamber, an outlet ipe therefrom, a series filter beds and the feed pipe, of an effluent of vertically arranged openings in the wall-0f 45 chamber located in the central chamber, an the chamber, gates consisting of two mcmoutlet pi etherefrom, a series of openings bers provided with cam rollers and spring in the we?! of the effluent chamber arranged held together in suitable guideways and devertically, gates therefor and means for signed to close centrally of the saido enings,

maintalmn that ate in an 0 en osition a air of floats connected to ether y bars, 5o-

. g f P .P P g which is on a leve with the water level in guides for the floats, a diamond shaped cam the central chamber and for closing the same, frame designed to enter between the rollers as the water changes itsrlevel, as and for the and spread the gates apart, as and for the purpose specified. purpose specified.

6. In a filtration plant, the combination 9. In a filter plant, the combination with with the central reservoir, the surrounding the filter beds and the walls thereof, of a cen-, 2 0 filter beds and the feed pipe, of an eflluent tral chamber surrounded by the filter, beds chamber, an outlet ipe therefrom, a series having openings in the wall thereof nearthe of vertically arranged openings in the wall of to a trough surrounding the chamber, an the efliuent chamber, gates therefor, a float e iuent chamber, .ports communicating with vertically movable in guide-ways and means the trough, valves for controlling the ports,

25 operated by the float for opening the gate ports leading into the central chamber,

on the Water level and for osing the same means for opening and clot ng the ports'conas the water changes its level, as and for the trolled by the rise and fall of the Water in the purpose specified. central chamber, outlet pipes from the 7. In a filtration plant, the combination trough into the central chamber, an outlet 3c with the central reservoir the surrounding ipe from the central chamber, and an overfilter beds andthe feed pipe, of an efliuent flow pipe extending from the to of the reschamber, an outlet ipe therefrom, a series ervoir mto the outlet pipe as anc for the purof. vertically arranged openings in the Wall of pose specified.v 3 the effluent chamber, gates consisting of two JOHN GRANT MAQGREGOR. 35 members springheld to ether in suitable /Vitnesses:

guides andclosing centra ly of the openings B. Born, a float held in suitable guides in the central A. CRIGHTON. 

